Yarway Desuperheaters PED/ATEX O&SI User guide

Brand: Yarway

Model: Desuperheaters PED/ATEX O&SI

Type: User guide

YARWAY NARVIK DESUPERHEATERS

PED/ATEX - OPErATing AnD SAfETy inSTrucTiOnS

WARNING

For safety reasons, it is important to take the

following precautions before you start work

ontheDSH*:

1. Read all labels fitted to the DSH* and

this sheet before installation, operation

ormaintenance.

2. Use DSH* for the intended purpose (according

contract/specification).

3. Remove the DSH* carefully from its

packaging, lifting by means of straps (heavy

weight) around the body.

4. Do not use the water inlet connection, yoke,

actuator or any of its accessories for lifting.

5. For installation of the DSH* use gaskets

and bolting material in accordance with the

relevant piping code (ASME/ B31.1 or EN) and

free of ‘forces, moments and torques’.

6. Additional mounting/modifications on DSH’s*

are not allowed without approval from Yarway.

7. The line must be depressurized, drained,

vented and cooled down before installation.

8. Handling of all DSH’s*, actuators and

accessories must be carried out by personnel

trained in all aspects of manual, mechanical

handling/lifting techniques and standard

safety procedures, in case of doubt, consult

your Supervisor and/or safety officer.

9. Yarway does not accept liability for site work

performed under supervision of others.

10. Each DSH’s* water supply line should

be protected with its own strainer with a

maximum element perforation size of 0.1 mm.

11. Insulate the DSH* in accordance with

plantrequirements.

12. Please, follow the procedure as detailed in

theIOM**.

13. The surface temperature as defined

in 2014/34/ECAnnex II 2.2.1.2 of the

Desuperheater is a function of the system

it is built into. When installed, the surface

temperature cannot be controlled by the

manufacturer.

Before installation these instructions must be fully read and understood

!! Read all warning labels fitted to the DSH*

before operation or maintenance !!

Never open, dismantle or modify the assembly

whilst under pressure/temperature or other

hazardous conditions.

NOTE

DSH* = Desuperheater

IOM** = Installation, Operation and

Maintenancemanual

VCOSI-03351-EN 15/12

INSTALLATION

1. Place the DSH* with the gasket onto the

mounting flange and insert the nozzle

carefully into the branch pipe.

2. Ensure that the spray nozzle assembly is

pointed with the direction of the steam flow

before tightening the mounting bolts.

3. Installation may be vertical or horizontal

piping (use support in case of heavy weight),

but the direction of water injection should

always be with the steam flow.

4. When there are positive shut-off

components in the water supply (including

electric actuators) then a safety relief

valve, of an approved type, should be fitted

(seeexample in the IOM**).

5. Connection of electrical supplies and/or

air piping should be in accordance with

themanufacturer’s instruction manual.

6. Verify and adjust, if necessary, set

points for air filter regulator and valve

positioner, following the manufacturer’s

recommendations.

7. When satisfactory co-ordination between

signals and temperature are attained,

adjustment of the set point can be made

and the system transferred to automatic

operation.

8. Ensure easy access of the operating

mechanism (actuator, positioner,

handwheels, etc.) if applicable.

CATEGORY

DSH’s* are manufactured in accordance with

2014/68/EC.

Pressure/temperature limits are indicated:

# on the DSH* nameplate

# design code: ASME B16.34, EN 12516 or

ASME B31.1

# on the actuator name plate

YARWAY NARVIK DESUPERHEATERS

PED/ATEX - OPErATing AnD SAfETy inSTrucTiOnS

NOTE

DSH* = Desuperheater

IOM** = Installation, Operation and

Maintenancemanual

FINAL INSPECTION

arway DSH’s* have been tested, degreased,

dried and prepared according to service

application. This should be carried out in

accordance with the relevant Yarway’s IOM**

and available upon request by: Yarway via our

website: www.valves.emerson.com

STATE OF DELIVERY / STORAGE /

SELECTION/ SERVICE LIFE

State of delivery

Yarway’s DSH’s* are delivered with protection

and tested according applicable QPF (Quality

Planning Form). Particular care should be

exercised when removing the DSH* from

its packaging and your special attention is

required to check carefully that no damage has

occurred to flange faces, threading, actuators,

connecting pipes, etc. before installation. Check

out IOM** - instructions before proceeding.

Storage

For short term storage, up to 6 months, no

additional preservation is necessary. Retain

the DSH* in its original packaging in a clean,

dry indoor location. For long term storage, use

only a dry indoor location. Follow instructions

given in the IOM** before placing the DSH* into

service, replace stem packing and inspect other

components to ensure correct functioning.

SPARE PARTS

Use only genuine Yarway components.

AllDSH’s* are identified by an identification

number, stamped on the identification plate.

Use this number when ordering spare parts.

Selection

Ensure that DSH’s* material of construction

and pressure/temperature limits shown on the

identification plate and according to the suitable

code for the process conditions. If in doubt,

contact Yarway or your localrepresentative.

Service life

Expected service life may vary upon condition of

service. Check unit at least once per 8000 hours

or longer intervals based upon site experience.

Yarway Desuperheaters PED/ATEX O&SI User guide

Yarway Desuperheaters PED/ATEX O&SI User guide

Yarway Desuperheaters PED/ATEX O&SI User guide

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